Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:35:36 2013 Optimize a model with 1342 rows, 30838 columns and 1531395 nonzeros Presolve removed 55 rows and 496 columns Presolve time: 4.46s Presolved: 1287 rows, 30342 columns, 1504925 nonzeros Variable types: 0 continuous, 30342 integer (30342 binary) Found heuristic solution: objective 18693.000000 Root relaxation: objective 1.102950e+04, 6659 iterations, 3.85 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 11029.5000 0 55 18693.0000 11029.5000 41.0% - 9s H 0 0 12113.000000 11029.5000 8.94% - 9s H 0 0 12017.000000 11029.5000 8.22% - 13s * 0 0 0 11036.000000 11036.0000 0.0% - 16s Cutting planes: Clique: 3 Zero half: 2 Explored 0 nodes (7367 simplex iterations) in 16.40 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.103600000000e+04, best bound 1.103600000000e+04, gap 0.0%